These tiny screw cameras are about $20 on Amazon (or $15 on eBay), with versions that plug into CCTV systems, composite inputs, and USB ports. There's also the bare camera, minus the fake screwhead. [via OPSEC]
The Amazon listing includes a photo of it installed in a public toilet door. Naturally, there are some customer questions:
Question: So do you give instructions for installing in public restrooms as seen in the picture?
Answer: You are welcome to check the wires diagram as below to see if it helps:
https://images-na.ssl-images-amazon.com/images/I/71lraFgulcL._SL1000_.jpg
… see moreBy iSoter SELLER on August 4, 2017